Support USB 3.0 Specification Revision 1.0. - Compatible with USB 2.0 and USB 1.1 - Output 2-port USB 3.0 interface supports 2 x USB operating at the same time. - Low power consumption unique voltage and current over-load protection effectively protect hub and other connection devices. - Ultra-slim and portable design especially for MacBook Air ultrabook tablet PC - Supports hot swapping plug and play - Support USB Mass Storage Class Bulk-Only Transport Specification. - Support USB 3.0 U0/U1/U2/U3 (P0/P1/P2/P3) and USB 2.0 L0/L1/L2 power saving modes. - Support Secure Digital v1.0/v1.1/v2.0 SDHC/SDXC (Capacity up to 2TB). - Support Secure Digital v3.0 UHS-I (Ultra High Speed)SDR12/SDR25/SDR50/DDR50/SDR104. - Support MultiMediaCard (MMC) specification v4.1/v4.2 x1/x4 bit data bus and DDR x4 bit data transfer mode. - Support user data locking providing a privacy protection solution. - Support SD Lock/Unlock Function. - External Serial Flash memory interface. - Compliant with USB bus-powered and self-powered power consumption requirements. - Consumed less than 2.5mA in USB 3.0 and USB 2.0 suspend mode